Computer Audio Asylum

Posted by dspringham on February 17, 2008 at 12:09:50

In Reply to: RE: Synergistic Research USB Cable posted by audioengr on February 17, 2008 at 11:31:30

mercman (Steve),
audioengr states that USB cable quality should not make a difference with the new ASYNC format. Is your Crimson not udated with the ASYNC interface and if so, I wonder why there would be a noticable difference with the new cable.

Also, is a USB cable and I2S cable not the same thing - I think I'm confused.

• RE: Synergistic Research USB Cable - audioengr 19:08:14 02/17/08 (0)
  In Reply to: RE: Synergistic Research USB Cable posted by dspringham on February 17, 2008 at 12:09:50

  USb is a cable from the computer to the audio converter, usually USB to S/PDIF or USB to I2S. I2S is the interface to the D/A chip. If you do USB to I2S, you avoid the conversions to S/PDIF and the clock recovery from S/PDIF.
  
  The USB cable has one signal pair and a power pair. The S/PDIF cable has a single signal pair. The I2S cable has 3 or 4 signal pairs, usually one data pair SDATA, one L/RCLK or "SYNC" pair, one MCLK or master clock pair and one BCLK, or bit clock pair.
  
  

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• RE: Synergistic Research USB Cable - SeVeReD 12:23:44 02/17/08 (1)
  In Reply to: RE: Synergistic Research USB Cable posted by dspringham on February 17, 2008 at 12:09:50

  Rio Tubes laid it out for me in the link below about usb & I2S. I'm betting that even with ASYNC or pace car or whatever... the higher your dac/system is in resolution the more one hears digital effects in cables.
  Steve
  Thanks for addressing USB robustness... I remember I use to drive myself crazy listening to the differences in dig coax cables too (back in the ol cd transport to DAC days). I chose an Orchid cable back then that I liked. So, ya, nothing magical or more robust about coax either I guess.
  Hope to talk with you within the year about possible configurations/needs using your stuff.
  Acer Aspire 9500 laptop Pentium 1.73GHz w/ 2 gigs ram, Vista Premium 32 bit, WAV/CUE files on Hard Drives via firewire, XXHighEnd ver. 0.9T-5 Player Q1 18, player priority nothing,thread priority real-time; Stello 100 USB-DAC nos
  

  • http://www.audioasylum.com/forums/pcaudio/messages/2/28584.html   (Open in New Window)

  
  

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  • RE: Synergistic Research USB Cable - audioengr 19:09:56 02/17/08 (0)
    In Reply to: RE: Synergistic Research USB Cable posted by SeVeReD on February 17, 2008 at 12:23:44

    Certainly both S/PDIF and USB cables can cause timing effects or jitter. This is why better cables in both cases can improve the sound with most interfaces.
    
    

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